Primary site--Heme & Lymphoid Neoplasms: What primary site and heme rule applies when a PET scan shows bilateral renal masses, hypermetabolic liver lesions and retroperitoneal lymphadenopathy, a right kidney biopsy was positive for diffuse large B-cell lymphoma, and the bone marrow biopsy was negative? See Discussion.
Reportability/Histology--Heme & Lymphoid Neoplasms: Is Monoclonal B-lymphocytosis of uncertain significance (MLUS) reportable? If so, what is the correct histology code?
Primary site--Heme & Lymphoid Neoplasms: What is the primary site code for a primary effusion lymphoma if the patient has multiple regions that are positive (e.g., pleural and pericardial effusion and the pleural fluid) for lymphoma?
Primary site--Heme & Lymphoid Neoplasms: Should the primary site be coded to C779 or C809 when a patient is diagnosed at another facility with mantle cell lymphoma and the staging bone marrow biopsy performed at this facility is negative? There is no available information concerning where the lymphoma originated.
Primary site--Brain and CNS: How is the primary site to be coded if a clinician used an MRI to diagnose a left cerebellar venous angioma? See Discussion.
Multiple Primaries--Hematopoietic: How many primaries are abstracted when a patient is diagnosed with essential thrombocythemia in 2007 and a bone marrow biopsy performed on 12/4/2009 shows primary myelofibrosis? See Discussion.
MP/H Rules/Histology--Melanoma: How is the histology coded for an invasive melanoma stated to have a "superficial spreading growth pattern"? See Discussion.
MP/H Rules/Histology- -Melanoma: What is the correct histology code if the final diagnosis for an excisional biopsy specimen is reported as "malignant melanoma, superficial spreading type" but the under the "cell type" section in the CAP protocol layout of the pathology report it lists "cell type: epithelioid"? See Discussion.
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